feholdexcept(3p)
NAME
feholdexcept - save current floating-point environment
SYNOPSIS
#include <fenv.h> int feholdexcept(fenv_t *envp);
DESCRIPTION
The feholdexcept() function shall save the current floating-point environment in the object pointed to by envp, clear the floating-point status flags, and then install a non-stop (continue on floating-point
exceptions) mode, if available, for all floating-point exceptions.
RETURN VALUE
The feholdexcept() function shall return zero if and only if non-stop
floating-point exception handling was successfully installed.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
The feholdexcept() function should be effective on typical
IEC 60559:1989 standard implementations which have the default non-stop
mode and at least one other mode for trap handling or aborting. If the
implementation provides only the non-stop mode, then installing the
non-stop mode is trivial.
FUTURE DIRECTIONS
None.
SEE ALSO
fegetenv() , fesetenv() , feupdateenv() , the Base Definitions volume
of IEEE Std 1003.1-2001, <fenv.h>
COPYRIGHT
- Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .